High-strength PVC double-layer composite pipe

Abstract

The utility model provides a high-strength polyvinyl chloride (PVC) double-layer composite pipe, which relates to the technical field of PVC double-layer composite pipe design, comprises an inner pipe fitting and is characterized in that an outer pipe fitting is arranged on the outer surface of the inner pipe fitting. According to the utility model, the co-extruded inner pipe fitting is matched with the braid layer for mutual extrusion, and the outer pipe fitting, the inner pipe fitting and the braid layer are co-extruded, so that the integral connectivity can be maintained; in the extrusion process, the reinforcing groove, the first groove and the second groove are formed in the outer pipe fitting in an extending mode, the overall structural strength can be enhanced, double-layer different materials (inner PVC-M and outer PVC-U) are adopted for extrusion process production, the strength of PVC-U is achieved, the flexibility of PVC-M is achieved, sunlight permeation can be effectively isolated, bacterium breeding is completely eradicated, and the service life of the pipe fitting is prolonged. The conveyed water quality is optimized, and the applicability and the stability of the mechanism are improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC double-layer composite pipe design, in particular to a high-strength PVC double-layer composite pipe. Background Technique

[0002] Currently, due to the good performance and convenient and fast installation of various composite pipes, they are widely used as conveying pipes in various fields of industry, agriculture and life.

[0003] Some of the existing composite pipes are extruded from monomer PVC materials. Although this kind of pipe is widely used, in the actual use process, due to the temperature resistance of its own material, it will cause cracks in winter. The cracked pipes often interfere with the lives of users in winter, thus reducing the user experience, and it has low strength and is easy to age; and in the long-term use, due to product aging, it will cause sunlight penetration, resulting in the growth of bacteria on the inner wall of the pipe, affecting the transported water quality, and the water quality may affect the daily life of users, and to a certain extent, it has certain inapplicability and instability. Content of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art. Due to the temperature resistance of its own material, it will cause cracks in winter. The cracked pipes often interfere with the lives of users in winter, thus reducing the user experience, and it has low strength and is easy to age; and in the long-term use, due to product aging, it will cause sunlight penetration, resulting in the growth of bacteria on the inner wall of the pipe, affecting the transported water quality, and the water quality may affect the daily life of users, and to provide a high-strength PVC double-layer composite pipe.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a high-strength PVC double-layer composite pipe, including: an inner pipe fitting, an outer pipe fitting is arranged on the outer surface of the inner pipe fitting, reinforcing grooves are arranged on four sides of the outer pipe fitting, a plurality of first grooves are arranged in the middle of the inner wall of the reinforcing grooves, second grooves are arranged at opposite sides of two sides of a plurality of the first grooves, the second grooves are arranged on two sides of the inner wall of the reinforcing grooves, an auxiliary mechanism is arranged inside the reinforcing grooves, the auxiliary mechanism includes a woven layer, the outer surface of the woven layer is fixedly connected to the inner wall of the outer pipe fitting, and the inner surface of the woven layer is fixedly connected to the outer surface of the inner pipe fitting.

[0006] As a preferred implementation manner, reinforcing rib plates are fixedly connected to four sides of the outer surface of the woven layer, and a plurality of first bumps are fixedly connected to the middle of the outer surface of the reinforcing rib plates.

[0007] As a preferred embodiment, second bumps are provided at opposite sides of two sides of several of the first bumps, and the second bumps are fixedly connected to two sides of the outer surface of the reinforcing rib plate.

[0008] As a preferred embodiment, the outer surface of the reinforcing rib plate is fixedly connected to the inner wall of the reinforcing groove.

[0009] As a preferred embodiment, the outer surface of the first bump is fixedly connected to the inner wall of the first groove.

[0010] As a preferred embodiment, the outer surface of the second bump is fixedly connected to the inner wall of the second groove.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0012] In the present utility model, the inner pipe fitting extruded by co-extrusion cooperates with the woven layer to be extruded together, and the outer pipe fitting is extruded together with the inner pipe fitting and the woven layer, so as to maintain the overall connectivity. The reinforcing rib plate and the first bump connected by the woven layer cooperate with the second bump, so that the reinforcing groove, the first groove and the second groove are formed on the outer pipe fitting during the extrusion process. In this case, the overall structural strength can be enhanced, and the extrusion process is adopted to produce with two layers of different materials (inner PVC-M, outer PVC-U). It not only has the strength of PVC-U, but also has the flexibility of PVC-M, so as to effectively isolate the penetration of sunlight, prevent the breeding of bacteria, optimize the transported water quality, and improve the applicability and stability of the mechanism to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a three-dimensional schematic diagram of the overall external structure in the connected state of the components of a high-strength PVC double-layer composite pipe provided by the present utility model.

[0014] Figure 2 FIG. is a three-dimensional schematic diagram of the overall external structure in the separated state of the components of a high-strength PVC double-layer composite pipe provided by the present utility model.

[0015] Figure 3 FIG. is a three-dimensional schematic diagram of the overall external structure of the outer pipe fitting and the auxiliary mechanism of a high-strength PVC double-layer composite pipe provided by the present utility model.

[0016] Figure 4 FIG. is a three-dimensional schematic diagram of the overall external structure of the outer pipe fitting in the sectional state and the auxiliary mechanism of a high-strength PVC double-layer composite pipe provided by the present utility model.

[0017] Legend:

[0018] 1. Inner pipe fitting; 11. Outer pipe fitting; 12. Reinforcing groove; 13. First groove; 14. Second groove;

[0019] 2. Auxiliary mechanism; 21. Braided layer; 22. Reinforcing rib plate; 23. First bump; 24. Second bump. Specific implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1

[0022] As Figures 1-3 shown, the present invention provides a technical solution: a high-strength PVC double-layer composite pipe, including: an inner pipe fitting 1, an outer pipe fitting 11 is provided on the outer surface of the inner pipe fitting 1, reinforcing grooves 12 are provided on four sides of the outer pipe fitting 11, several first grooves 13 are provided in the middle of the inner wall of the reinforcing groove 12, and second grooves 14 are provided at opposite sides of several of the first grooves 13. The second grooves 14 are opened on both sides of the inner wall of the reinforcing groove 12, and an auxiliary mechanism 2 is provided inside the reinforcing groove 12. The auxiliary mechanism 2 includes a braided layer 21. The outer surface of the braided layer 21 is fixedly connected to the inner wall of the outer pipe fitting 11, and the inner surface of the braided layer 21 is fixedly connected to the outer surface of the inner pipe fitting 1.

[0023] In this embodiment, the inner pipe fitting 1 provided can provide properties with stronger toughness and higher strength. The inner pipe fitting 1 is made of PVC-M material, while the outer pipe fitting 11 is made of PVC-U material. The outer pipe fitting 11 forms slots through the reinforcing grooves 12 opened on four sides during co-extrusion with other components due to pressure and contact with the components. The several first grooves 13 opened in the middle of the reinforcing groove 12 and the several second grooves 14 provided on both sides thereof can provide higher strength and compressive resistance. The auxiliary mechanism 2 provided can provide the effect of increasing the strength and toughness of the pipe fitting. The overall material of the braided layer 21 is composed of composite fiber materials, which can provide toughness and provide a connecting effect between the inner pipe fitting 1 and the outer pipe fitting 11 it connects. Moreover, the braided layer 21 provided can provide a stable protective effect on the inner pipe fitting 1. The outer pipe fitting 11 realizes the mutual connection among the three through the process of mutual compression molding of the braided layer 21 and its connecting components and co-extrusion with the reinforcing groove 12.

[0024] Embodiment 2

[0025] As Figures 1-4As shown, reinforcing rib plates 22 are fixedly connected to all four sides of the outer surface of the braided layer 21. A plurality of first bumps 23 are fixedly connected to the middle of the outer surface of the reinforcing rib plates 22. Second bumps 24 are provided at opposite sides of the two sides of the plurality of first bumps 23. The second bumps 24 are fixedly connected to both sides of the outer surface of the reinforcing rib plates 22. The outer surface of the reinforcing rib plates 22 is fixedly connected to the inner wall of the reinforcing grooves 12. The outer surface of the first bumps 23 is fixedly connected to the inner wall of the first grooves 13. The outer surface of the second bumps 24 is fixedly connected to the inner wall of the second grooves 14.

[0026] In this embodiment, the braided layer 21 provides a retaining effect for the reinforcing rib plates 22 connected to the four sides. The overall material of the reinforcing rib plates 22 is composed of a tough composite PE material. When the first bumps 23 and the second bumps 24 connected to the reinforcing rib plates 22 are observed from one side angle, the two are in the shape of a mountain character. Thus, after being connected to the reinforcing grooves 12 and the reinforcing rib plates 22 provided on the outer pipe fitting 11, the first bumps 23 and the second bumps 24 will be connected to the first grooves 13 and the second grooves 14. At this time, since the planar shape of the first bumps 23 and the second bumps 24 is in the shape of a mountain character, the force can be buffered to both sides when the middle of the outer pipe fitting 11 is impacted. The provided reinforcing rib plates 22 can provide buffering and supporting effects. And because the reinforcing grooves 12 provided on the outer pipe fitting 11 extend outward from the middle, the relatively fragile part in the middle can be protected.

[0027] Working principle:

[0028] As Figures 1-4 shown, after the braided layer 21 and the inner pipe fitting 1 are compression molded, the outer pipe fitting 11 and the inner pipe fitting 1 connected with the braided layer 21 are extruded. During the extrusion process, the reinforcing rib plates 22 connected to the braided layer 21 and the first bumps 23 and the second bumps 24 connected thereto will open up the reinforcing grooves 12 inside the outer pipe fitting 11 and make the reinforcing rib plates 22 snap into them. A plurality of first grooves 13 and a plurality of second grooves 14 opened on the outer pipe fitting 11 will be connected to the first bumps 23 and the second bumps 24. After the connection is completed, if the middle of the outer pipe fitting 11 is stressed at this time, the stress will be transmitted to the reinforcing rib plates 22 connected in the opened reinforcing grooves 12, and the first bumps 23 and the second bumps 24 will be used for buffering and releasing the force to both sides. And the provided inner pipe fitting 1 can isolate the penetration of sunlight, prevent the breeding of bacteria, and optimize the transported water quality.

[0029] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-strength PVC double-layer composite pipe, comprising: An inner pipe (1), characterized in that an outer pipe (11) is provided on the outer surface of the inner pipe (1), reinforcement grooves (12) are provided on four sides of the outer pipe (11), a plurality of first grooves (13) are provided in the middle of the inner wall of the reinforcement groove (12), second grooves (14) are provided at opposite sides of the plurality of first grooves (13), the second grooves (14) are opened on both sides of the inner wall of the reinforcement groove (12), an auxiliary mechanism (2) is provided inside the reinforcement groove (12), the auxiliary mechanism (2) comprises a braided layer (21), the outer surface of the braided layer (21) is fixedly connected to the inner wall of the outer pipe (11), and the inner wall of the braided layer (21) is fixedly connected to the outer surface of the inner pipe (1).

2. The high-strength PVC double-layer composite pipe according to claim 1, characterized in that: Four sides of the outer surface of the braided layer (21) are fixedly connected to reinforcing rib plates (22), and a plurality of first protrusions (23) are fixedly connected to the middle of the outer surface of the reinforcing rib plates (22).

3. The high-strength PVC double-layer composite pipe according to claim 2, characterized in that: Second protrusions (24) are provided at opposite sides of a plurality of the first protrusions (23), and the second protrusions (24) are fixedly connected to two sides of the outer surface of the reinforcing rib plate (22).

4. The high-strength PVC double-layer composite pipe according to claim 3, characterized in that: The outer surface of the reinforcing rib plate (22) is fixedly connected to the inner wall of the reinforcing groove (12).

5. The high-strength PVC double-layer composite pipe according to claim 3, characterized in that: The outer surface of the first protrusion (23) is fixedly connected to the inner wall of the first groove (13).

6. The high-strength PVC double-layer composite pipe according to claim 3, characterized in that: The outer surface of the second protrusion (24) is fixedly connected to the inner wall of the second groove (14).

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